add get_env
add get_env

wcy123/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool,zhuxiangkui/erl_tool,zhangchaoeasemob/erl_tool,zhuxiangkui/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool,zhuxiangkui/erl_tool,zhuxiangkui/erl_tool,zhuxiangkui/erl_tool,zhangchaoeasemob/erl_tool,wcy123/erl_tool